Jenny was afraid of water, so she stood  ______ the lake and watched her friends swim.  [ ]

A. in the middle of

B. at the bottom of

C. on the edge of

D. on both sides of

针灸治疗脱肛的肾气不固可在基本处方基础上再加（）。

A.阴陵泉

B.气海

C.足三里

D.大敦

E.肝俞